Aha, going through my old spectroscope threads, identified @NateWeatherly as the benefactor of the Lippman 2000 .ti3 file. After chunking through the ISSA data to produce a similar file, thanks again Nate for the tedious Lippman work!
Edit: Of note, Nate reported in my old threads that he got good results producing dual-illuminant profiles (that would have to be DCP, not ICC) with matrix camera data and Lippman 2000 training, so don’t have to sweat getting SSF data to see improvement. Here’s his post:
https://discuss.pixls.us/t/the-quest-for-good-color-2-spectral-profiles-on-the-cheap/18286/59